The Equivalence of the Final Stretch and Crack Tip Opening Angle Criteria for Plane Strain Crack Growth

[+] Author and Article Information
E. Smith

Joint Manchester University/UMIST, Metallurgy Department, Manchester, M1, United Kingdom

J. Eng. Mater. Technol 103(2), 148-150 (Apr 01, 1981) (3 pages) doi:10.1115/1.3224986 History: Received July 08, 1980; Online September 15, 2009


The equivalence of the final stretch and crack tip opening angle criteria, as applied to the Dugdale-Bilby-Cottrell-Swinden type model for Mode I plane strain crack growth, is demonstrated. This equivalence is independent of the plastic zone size, geometrical parameters, and the stress distribution within the fracture process zone, if the yield stress is sufficiently low and the crack growth resistance is sufficiently high. The results therefore provide further support for the viability of crack tip opening angle as a crack growth characterizing parameter.

Copyright © 1981 by ASME
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